William a



w. A. SMITH.

MOUNTING FOR HAMMER DRILLS.

APPLICATION FILED APR. 12. 1919.

1,321,565; Patented Nov. 11, 1919.

A TTOR EYS.

TED STATES PATENT OFFICE.

WILLIAM A. SMITH, OF EASTON', PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW J ERSEY, A CORPORATION OF NEW JERSEY.

MOUNTING FOR HAMMER-DRILLS.

Specification of Letters Patent.

Patented Nov. 11, 1919.

Application filed April 12, 1919. Serial No. 289,536.

To all whom it may concern: 1

Be it known that I, WILLIAM A. SMITH, a citizen of the United States residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvement in Mount ings for Hammer-Drills, of which the following is a specification.

This invention relates to rock-drills andv especially to a rock-drill of the hammer type in which the drill is mounted to slide forwardly and rearwardly in a shell. The invention in particular relates to the means employed by means of which a guide is fastened to the drill having flanges adapted to enter the usual grooves provided in the sides of the shell.

The objects of the present invention are to provide a means for mounting or fastening a guide upon the drill, the guide having means for slidably engaging a shell in which the drill and guide may be mounted. A further object isto mount the guide upon the drill by means of the same bolts used in securing the several parts of the drill together. Another object is to provide a mounting which may be readily and conveniently connected and disconnected from the drill by simply removing and replacing nuts on a pair of bolts mounted on the drill.

lVith the above and other objectsin view, this invention consists in the features of construction and operation set forth in the following specification and claimsand illustrated in the accompanying drawings, forming a part hereof, in which Figure 1 shows a longitudinal view of the drill and guide with the guide in operative position.

Fig. 2, a similar View of the moved.

Fig. 3, a perspective view of the guide.

Referring more particularly to the figures of the drawing, 1 refers generally to a drill body or cylinder which may be of any desired type the one shown for purposes of illustration being of the hammer drill type for which the present invention is specially adapted. At 2 is shown the guide by means guide reof which the drill is held in slidable engage-.

on either side with lugs 5 provided with suitable holes through which pass bolts 6 which also pass through holes provided in lugs 7 provided near the forward end of the drill cylinder or body portion. The bolts 6 are made sufficiently long to extend forwardly from the lugs 5 so that there is ample space on the bolts 6 to engage lugs 8 formed on theforward end of the-guide 2. From the above description it will be'seen that nuts 9 located on the forward ends of bolts 6 will securely hold the forward end of guide 2 and the front head 4 to the drill body 1. Y

At the rear end of the drill body 1 is a back head having lugs 11 extending from either "side through which pass bolts 12 which are preferably in alinement with the bolts 6 at the forward end of the drill 1. Lugs 13 in alinement with lugs 11 are located near the rear end of drill body 1 so that bolts 12 may pass through suitably alined holes in both sets of lugs. Nutslt on bolts 12 allow the back head 10 to be securely held against the rear ends of the drill body 1. On the heads 15 of the bolts 12 are provided integralextensions 16 which may be suitably tapered as clearly shown in Figs. 1 and '2. g

Lugs 17 located near the rearward portions of the guide 2 are suitably bored as shown at 18 toprovide depressions to correspond with the tapered extensions 16,011 bolt heads 15 so that the lugs 17 will set overand engage the bolt head extensions 16 as shown in Fig. 1 by means ofthese depres'sions.

WVith the parts in the position shown in Fig. 1 the drill and guide are in operative position and ready for insertion in a drill shell commonly used when the drill is used in a mounted position as in drifting. Should it be desired to replace the guide 2 with another, as, for instance, when the guide 2 becomes unduly worn, it is only necessary to loosen nuts 9 and slip the lugs 8 from the bolts 6 and the guide 2 may be completely removed fromthe drill and another placed in its stead. I

From the above it will be seen that means have been provided which will securely hold the drill and guide in operative position relatively to each other and will also permit changing the guide readily and easily.

It is to be understood that the present showing and description disclose only one specific embodiment ofthe present inventionand thatotherforms-and modifications are "included Within the'spi-ritand scope of the 1 ing" depressions provided in said guide.

,2; Inacombination, a drill, a guide' for said drill and means to holdsaid drill and guide, in {operative .position relatively to each other, lcompr slng' bolts engaging por- *tionso-f said drill and guide near one end thereofandbolts engaging portions of the drill near the other end and having extensions provided, on the head'ends ofsaid bolts engaging depressions provided in said gulde. r Y

[3. In combinatlon, a drill, a guide for vsaid drill, and means to hold saiddrill and 'guidein operative position relatively to each fsof other, comprising bolts engagingiportions of saldidrlll' and-lugs on said guide near one end thereof and bolts engaging portions of therlrill near the other end, and having-extensions engaging depressions provided in said guide; I V I 4. Incombination, a. drill,. a' guide for said drill, and'meansto hold said drill and guide inoperative position relatively to each other,i comprising bolts engaging portions off said drill and lugs on said guide near one end thereof, andbolts engaging portions of. the, drill near theother end and having extensions provided onthe head ends of said bolts engaging depressions provided'in said guide 5. In combination, a drill, a guide for said drill, and means to holdsaid'drill and guide in operative position relatively to each other, comprising bolts engaging portions of said drill and guide near the for- Ward end thereof, and bolts engaging portions of the drill near the rear end and having extensions engaging depressions provided in said guide.

6. In combination, a drill. a guide for said drill, and means to hold said drill and guide inoperative position relatively to each other comprising bolts engaging portions of said drill and lug on said guide near the forward end thereof, and bolts engaging portions of the drill near the rear end and having extensions engaging depressions provided in said guide.

7 Infcombination, a drill, a guide for said drill, and means to hold said drill and guide in operative position relatively to each other, comprising bolts engaging por tions of said drill and guide near the forward end thereof, and bolts engaging portions of thedrill near the rear end and having extensions provided on the head ends of said bolts engaging depressions provided in said guide.

' 8. In combination, a. drill, a guide for said drill, and means to hold said drill and guide in operative position relatively to each other comprising bolts engaging portions of said drill and lugs on sald gulde near the forward end thereof, and bolts engaging portions of the drill near the rear end and having extensions provided on the head ends of said bolts engaging depressions provided in said guide.

' In testimony whereof, I have hereunto set my hand.

. WILLIAM A. SMITH.

Witness FELIX AJALER.

I Copies ofithi s patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

